package com.cloudfast.utils;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import sun.misc.BASE64Decoder;

@SuppressWarnings("restriction")
public class ImgBase64 {

    private static final Logger logger = LoggerFactory.getLogger(Logger.class);

    /**
     * 将图片转换成Base64编码
     *
     * @param imgFile 待处理图片
     * @return
     */
    public static String getImgStr(String imgFile) {
        // 将图片文件转化为字节数组字符串，并对其进行Base64编码处理

        InputStream in = null;
        byte[] data = null;
        // 读取图片字节数组
        try {
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            boolean b = (in.read(data) != -1);
            logger.info(b + "");
        } catch (IOException e) {
            logger.error(e.getMessage());
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                logger.error(e2.getMessage());
            }
        }
        return Base64.encodeBase64String(data);
    }

    /**
     * 对字节数组字符串进行Base64解码并生成图片
     *
     * @param imgStr      图片数据
     * @param imgFilePath 保存图片全路径地址
     * @return
     */
    public static boolean generateImage(String imgStr, String imgFilePath) {
        //
        if (imgStr == null)// 图像数据为空
            return false;
        BASE64Decoder decoder = new BASE64Decoder();
        OutputStream out = null;
        try {
            // Base64解码
            byte[] b = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {// 调整异常数据
                    b[i] += 256;
                }
            }
            // 生成jpg图片
            out = new FileOutputStream(imgFilePath);
            out.write(b);
            out.flush();

            return true;
        } catch (Exception e) {
            logger.error(e.getMessage());
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    logger.error(e.getMessage());
                }
            }
        }
        return false;

    }
}